M27C64A-15F1

[ASHLEA]

I have M27C64A-15F1 and M27C64A-15F1L, does anyone know what the difference is?

The L suffix doesn't appear anywhere on the datasheet and I can't find any info on it ?

[Tesla DeLorean]

Good question, I don't see this in the ordering scheme here, or for other of the M27C series.

Apt to be a Die Shrink or Second Source, or Production Plant. I don't think it will be consequential as nothing is flagging up in searching. 

Perhaps Tube vs Tape-n-Reel modes of delivery.

@Peter BENSCH 

[Peter BENSCH]

Thank you, @Tesla DeLorean for bringing this to my attention.

The EPROMs have been discontinued for a very long time, so there is no more information available and I can only assume: I have never seen such a suffix L, but even if the L had a meaning (subjunctive), there were very likely no technical differences.

I hope this helps anyway?

Regards
/Peter

[ASHLEA]

Thanks for your replies, this is the part. I have other parts with the L suffix   ??

[ASHLEA]

Sorry without the L suffix !

[Tesla DeLorean]

I've seen too. I would look at the die size, bond wires, and ceramic / quartz housing, and production location. Could also relate to the lead frames, metal or tinning. Looking through materials here I couldn't see it called out across dozens of docs and data books.

Around this time ST, Intel and AMD all made very similar parts and had partnerships. There was always a strong push to shrink the die so more parts would fit on a wafer, so it was not unusual for the parts to change but retain form-and-function.